Radiation Pressure Feedback in Galaxies
نویسندگان
چکیده
منابع مشابه
The Disruption of Giant Molecular Clouds by Radiation Pressure & the Efficiency of Star Formation in Galaxies
Star formation is slow, in the sense that the gas consumption time is much longer than the dynamical time. It is also inefficient; essentially all star formation in local galaxies takes place in giant molecular clouds (GMCs), but the fraction of a GMC converted to stars is very small, ∼ 5%. While there is some disagreement over the lifespan of GMCs, there is a consensus that it is no more than ...
متن کاملAre the Narrow Line Regions in Active Galaxies Dusty and Radiation Pressure Dominated?
The remarkable similarity between emission spectra of narrow line regions (NLR) in Seyfert Galaxies has long presented a mystery. In photoionization models, this similarity implies that the ionization parameter is nearly always the same, about U ∼ 0.01. Here we present dusty, radiation-pressure dominated photoionization models that can provide natural physical insight into this problem. In thes...
متن کاملStar Formation and Feedback in Dwarf Galaxies
We examine the star formation history and stellar feedback effects of dwarf galaxies under the influence of extragalactic ultraviolet radiation. Previous work has indicated that the background UV flux can easily ionize the gas within typical dwarf galaxies, delaying or even preventing cooling and star formation within them. Many dwarf galaxies within the Local Group are, however, observed to co...
متن کاملAGN feedback in clusters of galaxies
Institute for Astrophysical Research and Astronomy Department, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA,Naval Research Laboratory, 455 Overlook Avenue SW, Washington, DC 20375, USA,Department of Astronomy, University of Virginia, P. O. Box 400325, Charlottesville, VA 22904-4325, USA,HarvardSmithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA, ...
متن کاملFeedback and environmental effects in elliptical galaxies
The role of the environment of an elliptical galaxy on its hot interstellar gas is discussed. In general, the X-ray halos of early-type galaxies tend to be smaller and fainter in denser environments, with the exception of group-central galaxies. X-ray observations show many examples of nearby galaxies which are undergoing gas stripping. On the other hand, most bright galaxies in clusters do man...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2011
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas/1152045